The Charlie Hills-trained three-year-old looked a potential world-beater following a jaw-dropping display in last year’s Albany Stakes at Royal Ascot and subsequent placed efforts in the Moyglare and Cheveley Park Stakes meant connections headed into the winter with realistic ambitions of Classic glory.
But the dream was short-lived, with an early-season illness meaning she did not return until the Coronation Stakes in June.
A disappointing effort at the Royal meeting followed by a no-show in the Falmouth at Newmarket suggested she may be a spent force.
However, a fair second behind subsequent American Grade One winner Euro Charline at Ascot in July hinted at a flicker of life and she headed to Yorkshire as an 11-1 chance for her latest Group Three assignment.
Fitted with cheekpieces for the first time, Kiyoshi appeared much more like her old self, travelling with the panache that was the trademark of her juvenile campaign.
Spencer was sitting pretty in behind the pacesetters heading inside the closing stages and once let down, his mount showed thrilling acceleration to seal the deal by a length and a quarter from 15-8 favourite Bragging.
Kiyoshi is now likely to test her powers at the highest level once again in the Kingdom of Bahrain Sun Chariot Stakes at Newmarket on October 4.
The trainer reserved special praise for Spencer, who stunned the racing world last month when announcing he was hanging up his riding boots at the end of the season.
“Jamie gave her an absolute peach of a ride and I will definitely miss him,” said the Lambourn handler.
“He has been great for me. He rode my first Classic winner (Just The Judge, 2013 Irish 1,000 Guineas) and has been a big supporter.”
Hills was again in the winner’s enclosure after Commemorative, ridden by James Doyle, opened his account at the second attempt in the DFS British Stallion Studs EBF Maiden.
“He got a great ride from the draw (stall two) and he’s a lovely, scopey horse,” said the trainer. “The Autumn Stakes at Newmarket (October 11) might be an option.”
Silk Sari was an emphatic winner of the DFS Park Hill Stakes for Newmarket-based Italian pair Luca Cumani and Andrea Atzeni.
Joint-owned and bred by Fittocks Stud, she went off at 8-1 for what is known as the fillies’ St Leger and quickened five lengths clear of Groovejet with stunning ease.
Bond’s Girl (14-1) earned a sum in vast excess of her tiny purchase price in the Weatherbys Hamilton Insurance £300,000 2-Y-O Stakes.
One of seven Richard Fahey-trained runners in the six-and-a-half-furlong event, the £3,000 purchase came home with a powerful run to pinch the race by two lengths from Heartbreak Hero.
Fahey had earlier combined with apprentice jockey Jack Garrity to land the EBF Stallions Breeding Winners Carrie Red Fillies’ Nursery with 12-1 shot Home Cummins.